First, let’s talk about just what a urine enema is — or can be. You could fill a bag with your own urine (full strength or diluted with water) and give yourself an enema, or you could share your special golden potion with a friend. Remember that whatever you put in a rectum will be instantaneously absorbed into the bloodstream, so a diluted version may be your best bet. And even so, you may get an upset stomach. You could also penetrate someone with your dick, and pee inside their rectum, producing a brief, but less complicated piss douche. Some men cannot urinate when they have an erection, so then one would have to come, go soft, then pee. Other men I talked to claim they can pee while they are hard.

So how safe are all these water sports? Splash Alan, a contributing writer to Waterboys Magazine, says,

Piss is sterile. As long as you don’t have any urinary tract infections your urine is safe. Hell, back when I was a Navy corpsman we were instructed to always try and keep open battle wounds to the abdomen moist. If water wasn’t available the instructions were ‘piss on the battle dressings before application to the wound.’ What more can I say?

According to San Francisco Sex Information, urine isn’t necessarily sterile, but it is very clean as far as bodily fluids go, even cleaner than spit. Peeing on someone or in someone is relatively safe; being peed on or in can be safe, with a few exceptions. Hepatitis B, cytomegalovirus (CMV), the genital herpes virus, chlamydia, and gonorrhea may be present in the urine of a person infected with any of these diseases, says Dr. Beth Brown, a physician and advice columnist. Therefore, if infected urine comes into contact with broken skin or a mucous membrane (like the rectum), transmission and infection can occur. There is no evidence of HIV being transmitted through urine, however most sex educators will not say it is 100% safe.

I don’t know anyone who has actually given or received a urine enema, but I will keep asking for you, Kevin!

I have some interest in enemas and want to know about using coffee or beer in an enema. Do porn stars have an enema before an anal scene? Do they eat a special diet to keep from getting gassy?

–L.C. Jr.

Enemas are a great way to cleanse your anal canal and rectum, and many people like to have an enema before anal penetration to make sure their butts are squeaky clean. When giving yourself an enema, you should always, always use plain warm water. You should never add coffee, beer, wine, or any other additives to an enema — this will make you very sick very quickly. Anything you put in your rectum will be directly absorbed into your bloodstream, just like if you shot it into your veins with a hypodermic needle. Plain water is all you need to flush yourself out.

In general, porn stars do give themselves enemas before anal sex scenes, although not right before a scene. It’s a good idea to give yourself an enema several hours before you plan on having anal sex in order to give your body a chance to recover and relax. Some porn stars I know actually clean out the night before and report that it’s the best way to ensure that their bowels have returned to normal and there won’t be any unexpected mess.

As for their diets, well, it depends. Some people find that before a round of heavy anal play, they like to eat mild foods which are easy to digest and won’t upset their gastrointestinal tract. Many of the gay male anal fisters I know recommend avoiding foods with seeds like strawberries. I’d say that avoiding the five alarm chili is a great idea!

Do I have to have an enema in order to get fucked in the ass? I am worried that it will be messy, and I don’t want it to be. How do I make sure I’m clean and how do I give myself an enema? One more thing — is there such a thing as too many enemas? How often can you have one?

–A.J., New York, NY

This question reminds me of the first time I did a pretty heavy enema scene. A fetish photographer I know was shooting a film on girls and bodily fluids, and he wanted a girl who could shoot water out of her ass. So, he called me. He had photographed me before nude and in various compromising positions, and we were pretty comfortable with each other. But nothing could have prepared me for what he had in mind, and, after all, having someone give you an enema is a real bonding experience.

We were both in his tiny East Village bathroom when he filled the superhero red enema bag. I got down on my knees on the cold tile floor and put my ass in the air. He poured some lube in his hand, and I felt his finger stroke my asshole and slip its way inside. I immediately thought, Wow, he has big fingers. I started to loosen up around him, and told him I was ready. As I felt the tip right at my opening, my clit jumped and I could feel myself getting wet. I wanted to reach around to start jerking myself off, but we had a long way to go, so I postponed my need. He slipped the nozzle inside me, and asked me if I was ready. Oh, I was ready alright. He flipped the gauge and I felt warm water filling me. I like it when the water pressure isn’t too high, flowing at an almost sleepy pace; a really unhurried enema always feels more sensual, like slowly filling a tub for a bubble bath. As the water crept inside me, I started to get that full feeling, which was intensely pleasurable. I told him when I was ready, and he removed the tube, and gently shut the door behind him.

We repeated the enema once more, until the water was all clear. Then came the tricky part. He filled me up, and when I was ready to expel, we moved onto his makeshift set. He started shooting, and then so did I. The first time we did it, I shot a pretty steady stream of water out of my ass, and he yelled Yeah! from behind his camera. Then we repeated the ritual — he’d fill me up, start the camera rolling, and I’d shoot for him — we did it thirteen times! Needless to say, that was the most enemas I’d ever have, and after the experience, I felt much more intimate with my photographer friend. And I felt more squeaky clean than ever before!

Now for my advice:

First. let me say that an enema isn’t necessary in order to have safe, relatively clean anal sex. Many people find that a nice warm and soapy shower or bath and a bowel movement before anal sex gets them pretty clean. But other people find that an enema helps reassure them about the cleanliness of their asses and the emptiness of their bowels. And others like to give or receive enemas as part of an S/M scene, and in these cases, an enema does not necessarily go hand in hand with anal sex but becomes an erotic activity unto itself.

If you’ve never had an enema before, you may want to start with an anal douche; these are popularly called “enemas,” but are less complicated to administer. You can buy a Fleet Enema, which has a pre-lubricated nozzle and is easy to use. Make sure you empty out the chemical solution and refill the bottle with plain warm water that feels like around body temperature. Squeeze the bottle to release the water into your rectum. Wait a few minutes, go sit on the toilet and let nature take its course. You can repeat the anal douche (about 2-3 times) until your bowels are completely cleaned out.

Giving yourself an enema with an enema bag takes a little more skill (and maybe even a mistress to administer it or a slave to assist you, which can add to the fun). You need to have an enema bag, tubing, and a hook of some kind (either over the toilet or the tub to hang the bag on). Fill the bag with warm water. Hang the bag within easy reach of your butt. Find a position that’s comfortable; you may want to try lying on your left side with your right leg pulled up to your chest or kneeling with your ass up, head down and one side of your face against the floor. You definitely want to use some water-based lubricant on the tip of the nozzle. Gently insert the tube into your rectum, then release the gauge on the bag until water begins to flow at the desired pressure (very low pressure is best). You’ll know when you’ve had enough. When you feel full, close the gauge, take the tube out and go to the toilet. Repeat several times until only water comes out during a bowel movement.

If you’re having an enema in preparation for anal sex, you should do it at least 2-3 hours prior to the sex to give your body a chance to reabsorb water and recover. Contrary to my little story about the thirteen enemas, it’s not a good idea to have enemas too frequently. They tend to stress out your rectum and too much of this evacuation can really throw your rectum, bowels and gastrointestinal tract off balance.